<!DOCTYPE html>
<html>
    <head>
        <title>exercise1</title>
        <meta charset="UTF-8" />
        <style type="text/css">
            h4{
                margin:0 auto
            }
            #T{
                background-color:aliceblue;
            }
            td{text-align:center}
        </style>
    </head>
    <body>
        <table border="4px" id="T">
            <caption align="center"><h4>课程表</h4></caption>
            <tr>
                <td colspan="3">时间\日期</td>
                <td>一</td>
                <td>二</td>
                <td>三</td>
                <td>四</td>
                <td>五</td>
            </tr>
            <tr>
                <td rowspan="2">上午</td>
                <td colspan="2">9:30-10:15</td>
                <td>语文</td>
                <td>语文</td>
                <td>语文</td>
                <td>语文</td>
                <td>语文</td>
            </tr>
            <tr>
                <td colspan="2">10:25-11:10</td>
                <td>语文</td>
                <td>语文</td>
                <td>语文</td>
                <td>语文</td>
                <td>语文</td>
            </tr>
            <tr></tr>
            <tr>
                <td rowspan="2">下午</td>
                <td colspan="2">14:30-15:15</td>
                <td>语文</td>
                <td>语文</td>
                <td>语文</td>
                <td>语文</td>
                <td>语文</td>
            </tr>
            <tr>
                <td colspan="2">15:25-16:10</td>
                <td>语文</td>
                <td>语文</td>
                <td>语文</td>
                <td>语文</td>
                <td>语文</td>
            </tr>
        </table>
    </body>
</html>